Learn to use the rudder. Most new guys forget this control function as soon as they leave the ground. When flying in a cross wind, practice flying the airplane perfectly paralell to the runway. You will soon see how much you are being blown in or out depending on the wind direction. Use rudder in the opposite direction that the wind is blowing you. I was practicing my IMAC sequence on Friday with a cross wind and had to hold 1/2 rudder stick to fly a strait pass. You will also notice that your airplane will change in pitch and roll trim while holding rudder. If your TX has mixing you can mix that out but that is a very long winded topic by its self. Good luck